White Truffle oil is a modern culinary ingredient added to foods, which is intended to impart the flavor and aroma of truffles to a dish. Most white truffle oils are not, in fact, made from actual truffles, but are instead a synthetic product that combines a thioether, one of numerous organic aromatics odorants found in real white truffles, with an olive oil base. A few more expensive oils are alleged to be made from white truffles or the by-products of truffle harvesting and production, though the flavor of white truffles is difficult to capture in an oil.